Cephalopod rearing cage, cephalopod escape prevention sheet, and use thereof

Abstract

A cephalopod rearing cage capable of maintaining a cephalopod alive, wherein at least a portion of the cephalopod rearing cage is constituted by using a mesh sheet of not less than 4 mesh. Also provided is a cephalopod escape prevention sheet capable of maintaining a cephalopod alive, wherein at least a portion of the cephalopod escape prevention sheet is constituted by using a mesh sheet of not less than 4 mesh.

We claim: 
     
       1. A cephalopod rearing cage capable of maintaining a cephalopod alive, wherein at least a portion of the cephalopod rearing cage is constituted by using a mesh sheet of not less than 4 mesh, and
 wherein a top surface of the cage is open. 
 
     
     
       2. The cephalopod rearing cage according to  claim 1 , wherein an upper portion of the cephalopod rearing cage is at least partially constituted by using the mesh sheet. 
     
     
       3. The cephalopod rearing cage according to  claim 2 , wherein the mesh sheet is of not greater than 180 mesh. 
     
     
       4. The cephalopod rearing cage according to  claim 3 , wherein the upper portion of the cephalopod rearing cage has a color that has high metric lightness and that is classified as white or light gray in the metric lightness gradations of the Practical Color Coordinate System (PCCS: Japan Color Research Institute color scheme), and a lower portion of the cephalopod rearing cage has a color that has low metric lightness and that is classified as dark gray or black in the metric lightness gradations of the PCCS. 
     
     
       5. The cephalopod rearing cage according to  claim 1 , comprising:
 a folded portion in a top surface side of the cephalopod rearing cage. 
 
     
     
       6. The cephalopod rearing cage according to  claim 5 , wherein a minor angle of an angle formed by a side surface portion of the cephalopod rearing cage and the folded portion is not greater than 170 degrees. 
     
     
       7. The cephalopod rearing cage according to  claim 5 , wherein the folded portion has a color that has high metric lightness and that is classified as white or light gray in the metric lightness gradations of the PCCS. 
     
     
       8. The cephalopod rearing cage according to  claim 7 , wherein a height of the side surface portion of the cephalopod rearing cage is not less than twice a total length of the cephalopod. 
     
     
       9. The cephalopod rearing cage according to  claim 1 , wherein the cephalopod is from a common octopus superfamily. 
     
     
       10. The cephalopod rearing cage according to  claim 9 , wherein the common octopus superfamily is a common octopus family. 
     
     
       11. The cephalopod rearing cage according to  claim 10 , wherein the common octopus family is a common octopus. 
     
     
       12. The cephalopod rearing cage according to  claim 1 , wherein the cephalopod is a cephalopod being in a stage subsequent to a benthic stage. 
     
     
       13. The cephalopod rearing cage according to  claim 12 , wherein an individual weight of the cephalopod is not less than 10 g. 
     
     
       14. The cephalopod rearing cage according to  claim 1 , wherein the cephalopod rearing cage is adapted for use in at least any one selected from the group consisting of aquaculture, acclimatization, appreciation, transportation, and storage of a cephalopod. 
     
     
       15. Use of the cephalopod rearing cage according to  claim 1  for rearing of a cephalopod. 
     
     
       16. The cephalopod rearing cage according to  claim 1 , comprising a side surface and a bottom surface, the side surface and the bottom surface comprising the mesh sheet, wherein the mesh of the mesh sheet is between 10 and 20 mesh and comprises strands having a width no greater than 0.5 mm. 
     
     
       17. The cephalopod rearing cage according to  claim 16 , wherein a majority of the side surface is comprised by the mesh sheet. 
     
     
       18. The cephalopod rearing cage according to  claim 16 , comprising an upper portion and a lower portion, wherein the upper portion comprises a color that has high metric lightness and that is classified as white or light gray in the metric lightness gradations of the PCCS and the lower portion comprises a color that has low metric lightness and that is classified as dark gray or black in the metric lightness gradations of the PCCS, and wherein in use of the cephalopod rearing cage the lower portion is positioned in water and at least a portion of the upper portion is positioned above the water. 
     
     
       19. The cephalopod rearing cage according to  claim 1 , comprising a side surface and a bottom surface, a majority of the side surface and the bottom surface comprising the mesh sheet, wherein the mesh sheet has an open area greater than 50%. 
     
     
       20. The cephalopod rearing cage according to  claim 1 , wherein the mesh sheet is formed by strands defining apertures therewithin, and wherein the apertures are at least 0.15 mm by 0.15 mm in size. 
     
     
       21. The cephalopod rearing cage according to  claim 1 , comprising a side surface and a bottom surface, the side surface comprising the mesh sheet and including a folded portion, wherein the mesh sheet comprises between 40 and 60 mesh and is made of polyethylene fabric with quadrangular prism shaped apertures. 
     
     
       22. A cephalopod escape prevention sheet capable of maintaining a cephalopod alive, wherein
 at least a portion of the cephalopod escape prevention sheet is constituted by using a mesh sheet of not less than 4 mesh, 
 a first portion of the cephalopod escape prevention sheet has a color that has high metric lightness and that is classified as white or light gray in the metric lightness gradations of the Practical Color Coordinate System (PCCS: Japan Color Research Institute color scheme), and 
 a second portion of the cephalopod escape prevention sheet has a color that has low metric lightness and that is classified as dark gray or black in the metric lightness gradations of the PCCS. 
 
     
     
       23. The cephalopod escape prevention sheet according to  claim 22 , wherein the mesh sheet is of not greater than 180 mesh. 
     
     
       24. The cephalopod escape prevention sheet according to  claim 22 , wherein a height of the cephalopod escape prevention sheet is not less than twice a total length of the cephalopod. 
     
     
       25. The cephalopod escape prevention sheet according to  claim 22 , wherein the cephalopod is from a common octopus superfamily. 
     
     
       26. The cephalopod escape prevention sheet according to  claim 25 , wherein the common octopus superfamily is a common octopus family. 
     
     
       27. The cephalopod escape prevention sheet according to  claim 26 , wherein the common octopus family is a common octopus. 
     
     
       28. The cephalopod escape prevention sheet according to  claim 22 , wherein the cephalopod is a cephalopod being in a stage subsequent to a benthic stage. 
     
     
       29. The cephalopod escape prevention sheet according to  claim 28 , wherein an individual weight of the cephalopod is not less than 10 g. 
     
     
       30. The cephalopod escape prevention sheet according to  claim 22 , wherein the cephalopod escape prevention sheet is adapted for use in at least any one selected from the group consisting of aquaculture, acclimatization, appreciation, transportation, and storage of a cephalopod. 
     
     
       31. Use of the cephalopod escape prevention sheet according to  claim 22  for preventing a cephalopod from escaping.